Wednesday, June 04, 2008

Noise Figure and Logarithmic Amplifiers [The Wit and Wisdom of Dr. Leif—6]

Log amps are uniquely equipped as RF measurement elements at frequencies from near-dc up to 12 GHz because of their wide dynamic range, temperature stability, excellent log conformance, and ease of use—with measurements provided directly in decibels. Noise figure is a valuable metric when log amps are used in the signal path, as it indicates the system's ability to extract information in the presence of noise.


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